Improvement in packing for hydraulic cylinders



0; E BOARDMAN.

YLIND PACKING FOR HYDRAULIC c No.188,496.

, U NITED STATES PATENT QFFICE. 4

CHARLES E. BOARDM-AN, OF NEW YORK, N. Y.

IMPROVEMENT IN PACKING FOR HYDRAULIC CYLINDERS.

Specification forming part of Letters Patent No. 188,496, dated March 20, 1877; application filed February 17, 1877.

To all whom it may concern:

Be it known that I, CHARLES E. BOARD- MAN, of the city, county, and State of New York, have invented a new and Improved Packing for Hydraulic Cylinders, of which the followingis a specification:

1n the accompanying drawing, Figure 1 is a transverse section on line 00 m, Fig. 2. Fig. 2 is a horizontal section, on line y y in Fig. 1.

Similar letters of reference indicate corresponding parts.

The invention will first be described in connection with the drawing, and then pointed out in the claim.

and is provided with a flange, 0, which fits the deepest portion of the groove B. It also fits the groove closely at the inner surface of the cylinder, but is of such thickness as to leave a small space, d, behind it in the shallower part of the groove B.

When pressure is created in the cylinder, the water passes through the groove a and holes 1) into the space behind the packingring 0, and forces it against the ram as well as against; the outer side of the groove.

Having thus described my invention, I claim as new and'desire' to secure by Letters Patent The combination, with an elastic flanged packing, O c, of a cylinder, having the grooves a B, connected by the water-channels b, as shown and described, so that the packing will not shift, is forced evenly out, and will wear uniformly.

CHARLES E. BOARDMAN.

Witnesses:

G. SEDGWIGK,

ALEX. F. ROBERTS. 

